NVIDIA GeForce RTX 2070 / Core i7-8700K @ 3.70GHz

With some tuning, the RTX 2070 makes the most sense for gamers with 4K monitors. Though serious gamers hardly play at 4k. In terms of memory, the RTX 2070 's 8192 MB RAM is more than enough for modern games and should not cause any bottlenecks. 4K gaming is joyous on this RTX 2070 , and with a little tweaking to your AA settings, it'd be hard to imagine a title not capable of 60 fps on average.

NVIDIA GeForce RTX 2060 / Core i7-8700K @ 3.70GHz

With some tuning, the RTX 2060 makes the most sense for gamers with 4K monitors. Though serious gamers hardly play at 4k. In terms of memory, the RTX 2060 's 6144 MB RAM is more than enough for modern games and should not cause any bottlenecks. In short the performance is exceptional, there's no question that this is one of the most powerful single GPU out there in 2019 .

NVIDIA GeForce RTX 2080 / Core i7-8700K @ 3.70GHz

It is worth noting that the RTX 2080 is a very power hungry card and requires a decent power supply unit. In terms of memory, the RTX 2080 's 8192 MB RAM is more than enough for modern games and should not cause any bottlenecks. Deciding whether to invest so much money in a high-end GPU like RTX 2080 requires careful thought. 4K gaming is joyous on this RTX 2080 , and with a little tweaking to your AA settings, it'd be hard to imagine a title not capable of 60 fps on average.